Gas Piping; Servicing The Filter - Lennox G21Q Series User's Information Manual

GAS PIPING

AUTOMATIC
GAS VALVE
RIGHT SIDE PIPING
FIGURE 4
FOR UNIT TO
OPERATE DISCONNECT
SWITCH MUST
BE IN ON" POSITION
TYPICAL
FUSE/DISCONNECT
SWITCH BOX MOUNTED
ON FURNACE
FIGURE 5

Servicing the Filter

Inspect and clean air filters each month. Filters must
be cleaned when dirty to assure proper furnace op
eration and maintain efficiency.
A-Cleaning Reusable Foam Filter
1- Turn off electrical power to furnace.
2- Remove blower access panel. Wait for blower to stop.
3- Remove filter by sliding up and out of channel.
4- Wash filter with water and a mild detergent. For in
creased efficiency, filter media should be sprayed with
Filter Handicoater when dry. Filter Handicoater is RP
products No. 418 and is available as Lennox part No.
P-8-5069. See table 1 for replacement filters.
MANUAL MAIN
SHUT-OFF VALVE
GROUND
JOINT
UNION
DRIP LEG
GAS CONNECTOR
G21 Model No.
All Q-40,-60,
Q3-80, Q4-80 and
V3-60, -80 units
Q5-80 and all
Q-100 units: and
V5-80,-100 units
5- Reinstall filter. Slide filter into top channel and drop
into lower channel.
IMPORTANT-Do not replace foam reusable filters
with throw-away type filters.
6- Replace blower access panel.
Lubrication
Motors are prelubricated for extended bearing life; no
further lubrication is required.
Service
At the beginning of each heating season, the system
should be checked as follows:
1- Examine the termination ends of the intake and ex
haust lines for obstructions or blockages.
2- Check the intake and exhaust lines for holes, sag
ging or broken isolation hangers. If a sag is found in
either line, raise the line and support it with an isola
tion hanger. Replace any damaged isolation hang
ers.
3- The return air duct connection should be sealed to
the furnace casing and terminate outside the space
containing the furnace.
4- Check the physical support of the furnace. It should
be sound without sagging, cracks, gaps, etc., around
the base so as to provide a seal between the support
and the base.
5- Check that there is no obvious signs of deterioration
of the furnace.
6- Inspect and clean condensate drain system for free
flow of condensate.
IMPORTANT-If a change in the sound level of the unit
is detected or there is evidence of condensate leak
age around the unit, contact your Lennox service
technician.
Page 4
TABLE 1
Filter Part
Filter Size
No.
16" x 25"
P-8-7822
(406 x 635mm)
20" x 25"
P-8-7831
(508 x 635mm
)